Change brightness on 24 inch LED cinema display?

Question

Change brightness on 24 inch LED cinema display?

I recently bought the 24 inch LED cinema display and have found the screen to be a little bright during the evening
It's connected to my macbook pro which is currently shut and off to the side but the F1 and F2 keys on my keyboard do nothing and there's no brightness slider in the system preferences.
I called Apple support but they put me on hold to do 'research' for about ten minutes before asking me if the monitor was connected then said that some of them can't be dimmed.

Is that true? It seems a little strange for Apple to not allow you dim a monitor

Mac OS X (10.6.3)

Posted on Jun 5, 2010 6:05 PM

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Answer 1

Jun 6, 2010 1:05 AM in response to DetectiveSmall

Is the display's USB cable plugged into the computer? Brightness control uses USB.

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Answer 2

Das Wolf

Level 1

69 points

Jul 7, 2010 3:39 PM in response to DetectiveSmall

I am having the same problem with the same Apple 24 inch monitor.
Apple LED Cinema Display Product id 0x9236 running off my Mac Pro 10.5.8
And yes the monitor is plugged into the the USB port, otherwise it would show up in my system profiler > USB

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Answer 3

Dilznik

Level 1

125 points

Jul 10, 2010 4:47 AM in response to Das Wolf

I have the slider and it works but the brightness keys on my keyboard only change the MacBook Pro's screen brightness. How do I fix that?

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Answer 4

Jul 11, 2010 9:11 PM in response to DetectiveSmall

I too have the same issue, also to note;
- USB is plugged in.
- Displays built in camera works (and is listed in System profiler under USB)
- Displays Audio doesn't work. (and is not listed in System profiler under USB)
- Displays brightness adjustment not available (and display not listed in System profiler under USB)
- Display USB ports do work.
- Firmware is up to date.

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